What dose of GHKCu (copper peptide) is appropriate for a patient undergoing chemotherapy? WO2019167070A1 Topical copper tripeptide composition and process of preparation. Google Patents GHK Cu as a multifunctional copper peptide: synthesis routes, process engineering and emerging applications Systems Microbiology and Biomanufacturing Springer Nature Link Before vs. after 3 months of GHK Cu peptide therapy smoother texture, more even tone, and skin that looks healthier overall. Small peptide, big difference